A read-only comparison dashboard. Five major online marketplaces, scored on reach, price, speed, and fit. Numbers are approximate public and analyst estimates.
| Platform | Best for | Speed | Membership |
|---|---|---|---|
| Amazon | Everything / breadth | Fastest | Prime ~$139/yr |
| Walmart | Grocery / essentials | Fast | Walmart+ ~$98/yr |
| eBay | Used / rare / auction | Variable | None required |
| Etsy | Handmade / custom | Maker-set | None required |
| Temu | Ultra-budget | Slow | None required |
Amazon leads on every operational metric except price. Temu rivals it on raw user reach but trades speed and consistency for cost. Walmart is the only platform competitive on grocery and same-day pickup. eBay and Etsy are specialists, not substitutes. Optimal strategy: Amazon as default, plus one specialist for the job at hand.